Pump



Dec- 21 1926. 1,611,449

G. A.HUMASON .PUMP

Filed Jan. 9. 1926 2 Sheets-Sheet 1 Dec. 21 1926.

G. A. HUMASON PUMP v Filed Jan.

2 sheets-sheet 2 Patented Dec. 21, 1912 GRANVILLE A. HUIVIASON, OF I-IGUfiTQN, TEXAS.

PUMP.

Application filed January 9. 1926. Serial No. 80,146.

This invention .relates to new and useful improvements in a pump.

.One object oi the invention is .to provide a simple and efficient mechanism for pumpingifluid from wells, and which is of such design that it may be readily adapted for use as a swab in cleaning out an oil well preparatory to the production of oil :therefrom.

Another object of the invention is to provide a device of "the character described which may be -quickly and easily adjusted so as-to take up the wear of the plunger and thereby maintain a close fit of the plunger in the liner wherein it works.

A further feature of the invention resides in the provision of a mechanism of the char- :acter described which is of very simple con struction andeiiicient in operation and may be cheaply and'eas'ily produced and readily kept in repair.

With the above andother objects in view this invention has particular relation to certain novel features of construction, "operation and arrangement of parts, an example of which is given in this specification and illustrated in *the accompanying drawings, wherein Figure 1 shows a vertical sectional view of the pump.

Figure 2shows a crosssectional view taken on the line 2-2 of Figure 1.

Figure 3 shows a cross sectional view itakenon the line 8-3 of Figure 1.

Figure 4. shows a cross? sectional View taken on the line 4l-4of-Figure 1.

Figure 5 shows a vertical sectional View of the pump of such construction as to be specially adapted for use as a swab, for swabbing a well.

Figure 6 shows a cross sectional view thereof taken on the line 66 of Figure 5.

Figure 7 shows a cross sectional view taken on the line 77 of Figure 5.

Figure 8 shows a cross sectional View taken on line 88 of Figure 5, and

Figure 9 shows a fragmentary vertical sectional view, showing the swab plunger equipped with brushes for the particular purposes of cleanslng the inside of a well.

screen.

Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in each of the figures, the numeral 1 designates the liner, as set in a well bore. The numeral 2 desigrality of Screwed onto the lower end of the stem there is a nipple 5, whose lower end is re duced and externally threaded There is an annular slidable anchor 6 on the stem above said nipple, and preferably, there willbe one or more shims, as 7, arranged between said anchor and nipple for a purpose to be her inafter stated. The plunger proper is formed of a plusections 8, which are hingedly con nected, at their lower ends, to the anchor 6. These sections are arcuate in'cross sectional contour and are flared upwardly. The inner side of each section has a vertical dovetailed mortise 9, said 'mortises diverging; downwardly and the stem has corresponding dovetailed tenons 10, preferably formed integra'lly therewith and which dovetail. into the corresponding mortises 9. The Joints between the sections are broken by means l of a packing gasket 11 fixed to the stem and preferably formed of rubber, .or other packing material of substantially rectangular form and disoosed diap'onall with re-- spect to said joints. In the form shown in Figures 1 to t the fluid passageway through the stem 2 is controlled by the upwardly opening valve 12 which cooperates with the seat 13, both confined within t-he cage 3. In the form shown in F igures '5 to 8 said passageway is controlled by thendownwardlyopening valve 14-,

which is seated on the spring 10 and cooperates with the seat 16, all confined within the cage 17 which is screwed onto the nip ple 5.

In the form shown in Figures to 8 the upper end of the plunger sections are reduced and an inverted cup like packing 18 is fitted over said reduced portion. In plan view this packing 18 is elliptical in form with its longest diameter coinciding with the joint between the two packing sections or": which the plunger, in this form, is composed. If desired a metallic plate 19 may be imposed on this packing to rein iorce the same.

In operation upon downstroke the stem :2 will move downwardly relative to the plunger and the tenons 10 will operate to contract the plunger to permit the fluid to pass up around it. In the form shown in Figures 1 to i the fluid will also pass up through the stem 2, the valve 12 lifting to permit this. Upon upstroke the stem will move upwardly relative to the plunger and the tenons 10 will expand the plunger out closely against the liner walls and the fluid will be forced on up out of the liner'at the ground surface.

When the form shown in Figures 5 to 8 is used, the pump will be protected against an overload of fluid by the relief valve 14:. In case of overload this valve will open to release the excess load and the sucker rod will thus be protected from parting by reason of an excessive load. This type of the structure is particularly adapted for swabbing out a completed well by the well known swabbing process.

It is to be understood that a conventional standing valve is located in the liner beneath the plunger.

If desired the plunger may be provided with the annular peripheral brushes 20. as illustrated in Figure 9. These are particularly useful "for the purpose of cleaning the interior of a well screen after it has been set in the bore.

In case of wear on the plunger sections one or more of the shims 7 may be removed and this will give the stem, and tenons a greater range of movement relative to the plunger sections and said tenons will be thereby permitted to further expand the plunger to take up said wear.

lVhat I claim is:

1. In a pump a stem, a plunger on the stem having a limited longitudinal move ment relative thereto and formed of sections, said stem and sections, one having tenons and the other having mortises in which the tcnons work.

2. In a pump a stem, a plunger mounted on the stem, formed of sections and having a limited longitudinal movement relative to the stem, operative connectlons between the stem and plunger sections through which the plunger may be expanded and contracted by the movements of the stem relative to the plunger and a member on the plunger disposed to break the joints between the plunger sections.

3. In a pump a stem, a plunger mounted on the stem formed of sections and having a limited longitudinal movement relative to the stem, operative connections between the stem and plunger sections through which the plunger may be expanded and contracted by the movements of the stem relative to the plunger and means for varying the range of such movement.

4. In a pump, a tubular stem, a plunger mounted thereon, having a limited longitudinal movement relative thereto and formed of sections, operative connections between the stem and sections effective to vary the plunger diameter when the stem is moved longitudinally relative to the plunger.

In a. pump, a tubular stem, a plunger mounted thereon, having a limited longitudinal movement relative thereto and formed of sections, operative connections between the stem and sections effective to vary the plunger diameter when the stem is moved longitudinally relative to the plunger and a valve controlling the passageway through the stem.

6. In a pump, a tubular stem, a plunger mounted thereon, having a limited longitudinal movement relative thereto and formed of sections, operative connections between the stem and sections effective to vary the plunger diameter when the stem is moved longitudinally relative to the plunger, an abutment on the stem to limit the upward movement of the stem relative to the plunger and a removable shim between said plunger and abutment.

In testimony whereof I have signed my name to this specification.

GRANVILLE A. HUMASON. 

